2660560642 has 4 divisors (see below), whose sum is σ = 3990840966. Its totient is φ = 1330280320.

The previous prime is 2660560619. The next prime is 2660560649. The reversal of 2660560642 is 2460650662.

It is a happy number.

2660560642 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 2380366521 + 280194121 = 48789^2 + 16739^2 .

It is not an unprimeable number, because it can be changed into a prime (2660560649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 665140159 + ... + 665140162.

Almost surely, 2^2660560642 is an apocalyptic number.

2660560642 is a deficient number, since it is larger than the sum of its proper divisors (1330280324).

2660560642 is a wasteful number, since it uses less digits than its factorization.

2660560642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1330280323.

The product of its (nonzero) digits is 103680, while the sum is 37.

The square root of 2660560642 is about 51580.6227376134. The cubic root of 2660560642 is about 1385.6633195685.

The spelling of 2660560642 in words is "two billion, six hundred sixty million, five hundred sixty thousand, six hundred forty-two".